Perpetual calendar



2 Sheet's-Sheet- 1 A. PATTERSON PERPETUAL CALENDAR fil/ Paersow '030m oQLucbfnuLulLCb( QQuMLStlDOQm Masks umluibfmukulmboQlumfnuQLL May 9, 1950 Filed Sept. 30, 1946 avwwvmulumtbTQQLulurmvQu wwmQ May 9, 1950 A. PATTERSON 2,506,888

PERPETUAL CALENDAR Filed sepi. 3o, 194e 2 sheets-sheet 2 rdf N l Patented May 9, 1950 UNIT-ED STATE-S PAT-ENT OFFICE 2,556,888 PERPETUL CALENDAR AlfePattersom Spokane, Wash. Applieat'iehslt'eiiur30, 1946, serial m1700315 `1- Claim. v'(cl. 40"-115) This invention relates to Van improved v'type :of perpetual calendar.

Itis an object of this invention to provide 'a mechanical calendar which'maybe used to vindi'- cate the calendar month and date-of 'any month in any year.

Another object of this rinventionis to provide an improved mechanical calendar for use inindicating any month in any year whereby ythe changing of the calendar may be readily accomplished by movement of ibut a'si'ngle handle.

Still another object of this invention is to provide an improved mechanical 'calendarhaving a sliding date plate or card and a sliding cover'plate for blanking from view the dates not applicable to 'the selected month, wherein the calendar'is so constructed' and arranged'that sliding movement of `the1cover plate or card will effect Sliding movement f the date plate after the cover plate has moveda certain distance independent' ofthe date plate.

Yet another object of this' invention is to` provid'e ay mechanical calendar'of the kindto be more particularly described hereinafter, which is cionstructed witha minimum number 'of partsand which may be'readily "operated with aminimum of instructions.

A further. object .ofl this invention. istoprovide a r mechanical 'calendar "of this kindwhich' may be readily constructed and manufactured with "'a.

tion and details of construction `disclosed inthe dran/ing andspeciication, andttlrenmore particularly Vpointed out in the appended claim.

In the drawings,

Figure 1 is .a top plan View, partly away, of my mechanical calendar-,

Figre'Z is a vertical section taken on the yline 2--2 of Figure 1,

YFigure 3 .is a top plan view ofa' modified form of my invention; and

Figurei Vis a bottom plan view with'the rear cver removed.

Referring to the drawings, in Figuresl andfz, the numeral Il] designates generally -a 'mechanical calendarconstructed according to anembodimient of my invention. "The calendar Iis constructed With'a face platefi La date plate I2, a eoverplate I4, andan 'indicator i5, pivotally connected together by aA pivot pin or rivet i6, which'y plates may 'be made' of metal, plastic, paper, or'oth'er`v suitable material.

HThe face 'plate II is formed of la rectangular sheet'f material and is formed Asubstantially midv'vay'alongv 'the length "thereof with "a"segbroken mental-arcuate cut-out portion i1, having 'rad "1'. ly Ydisposed side edges, which extend olivergi" 1y outward from the pivot IG midway Aalong the lower side edge oftheplate `I i An elongated lsegmental arcuate 4slo't `I8 lis forrried through "the plate Iiinwardlyof the cut-out lll' and a 'second elongatedsegmental arcuate `slot I9 inwardlyff menons-g..

'A segmental arcuate Vdate plate -I 2 is `'piifc-,ag'lly connected to theface plate "II by pin lIl,"vvl ilzy the-plate I2 may slide Vvrelative "to 'the lface p t il about the pivot pin I6. The "dateplate provided on its'u'ppersurface with'numericial indicia arranged in six concentric segmentahariiate tiers or series, landvvitl'i lthe-nu'rribers'inail jacent tiers ldisposed in radially jeiten'idi'rfr 'oblurnns converging at the pivot'point I6, e'rs't or uppermost series includes numbers :1 of?, the second series numbers 2te iejthetlird JQuito/721, the fourth 1'6 to VV28,the fifth 23 to Blfardthe ih each series'increasing arithm'etic'ally"irrnlleftto right'and the series soarrangedthat-tlelast numbers in the first four arcuateseries are-radii ally aligned and the first numbersi'n 'the'sco'rd to the last series are radially aligned. Thepening I'I in the faceplate i'iss'uch as to-le'ipose for viewingafcomplete ifnontl'rof numbers 4inthe date plate I2, or in otherlvlords, is lof'fsuc'hfa''sie to expose seven spaces in eachseries in such a manner that theunu'mbers increase from-'left'ftb right in lower fsejrfies asin "a regular `caiendar month. The' `numbers areso v'arrangedthinitiiert the numbers in 'each'radiallcolumn incieaser'b'y seven inwardly toward the pivot I6.

segmental arcuate cover plate i4 is pivotally mountedbetween the face plate l1 and 'date plate i 2 onthe pivot `I'S'for covering certain selected numbers Y'in the 4cut-out portion I'lso 'thatj'tle numbers visible will correspond to: the nuriibr o f days in the -vselected month. The'plate 'If is formed With a" segmental varcuate outer-seidgefiel?v suflicient length ,tojco'ver at leastthree numbers a reduced'radius portion'orjnotched" edge for cov-` ering' the'nun'ibersin'the sixth'series.

vThe Vpointer` or Aindicatingarm isis pivotally mounted on the pivot pin I6 and is provided `iiith a knob or handle fixed on its upper sideKvher-eby an operator may vmove the indicator Withhis ngers. vThe indicating ar'm'i Efis iXe'd rlaftivefto the covei` 'platedl `bya rivetl whiche tends through" the arcuate" slot I9` and 'is slidableith "i" in so that movement of the indicator arm I5 ver the' yface plate'k I I effects'sliding of the covei'plate I4 relativetofthe faceplate I I.

v'The cover plate lsdfilri'her formed '7W`i-1f1 short'jsegmetital"arcuateslot* 22 lin which *.24 xed 'toftheuate pme" yi2 `may slide. The-slot..

22 is of a length equal to three radial columns so that when the cover plate I4 is moved that distance further movement thereof will eiect sliding movement of the date plate I2, together with the cover Aplate I4 relative to the face plate II.

The legends Mon to Sun are fixed on the face plate I I reading from left to right in radial alignment with the radial columns o F numbers for indicating the days of the week, and sliding of the date plate I2 Will align the numbers with the selected week day for the certain month desired. The slot I8 in the face plate I I extends a distance equal to the angular distance of ten radial co1- umns, starting from the left column of numbers on the date plate I2, and indicia, as A to G, starting from the fourth column are fixed on the face plate II. Indicia as Roman numerals I to IV are inscribed on the cover plate to be viewed through the slot I8 and correspond to the rst four columns on the date plate I2.

By moving the pointer I5 to register with a selected letter on the face plate II, the date plate I2 is moved to align the numbers thereon with certain week days and returning the pointer I5 to align a certain Roman numeral with the selected letter moves the cover plate I4 back to cover the last days in the month which should not appear for that certain month.

A chart or key is provided for determining the position of the pointer for any desired month, and may be attached to the face of the calendar I as shown in Figure 1. The key in Figure l is calculated for a period of time extending from 1936 through 1956.

In the use and operation of this calendar Il, when a certain month is selected to be shown, the key letter is determined from the key or chart and the indicator I5 moved into alignment with that letter on the face plate I I. The key Roman number for that month is determined, and the indicator I5 is moved back to align that number with the selected letter, whereupon the month for that date is shown in the aperture I1. The number key is to determine the number of days in the month and is as follows:

IV January, March, May, July, August, October,

December (31 days) As an example to show the month of January 1946, on the key, corresponding to January in the vertical column and 1946 in the horizontal column, the letter B is found. The handle I5 is moved clockwise to the letter B, whereupon the cover plate I4 exposes all the numerals on the date plate I2 and the numbers 1, 8, 15, 22 and 29 are in the radial column under the day of Tuesday. As January has 31 days, the numeral IV is selected and the pointer I5 moved back. to IV which still leaves 31 days exposed on the calendar I0.

As another example, to show the month of February 1948. The key letter G is found on the key chart. The indicator I5 is moved rst to G and back 2 spaces (II) thereupon moving the cover plate I4 to cover the numerals 30 and 31, exposing only 29 days.

In Figures 3 and 4, there is exemplied, a modied form of this mechanical calendar. The modified calendar 30 is formed of sheets of relatively stiff paper, as an envelope, though other materials may be used. The calendar 30 is formed of an envelope 3| having a front sheet or plate 32 and a rear sheet or plate 34. A date plate or sheet is pivotally mounted on the front sheet or plate 32 by a pivot pin 35, and a cover sheet or plate 31 is pivotally mounted between the front plate or sheet 32 and the date sheet 35. The cover plate or sheet 31 is provided with a strap or band 38 engaging about the rear side of the date plate 35 with the connections of the strap 38 and plate 31 spaced from the edges of the -plate 35 in certain positions, so that the corner of the strap 38 may engage the sheet 35 upon movement of the cover plate 31 for sliding the date plate 35.

The front plate 32 is formed With an opening 38 similar to that of the first form as opening I 1 and is covered with a transparent sheet 4U.

An indicator and handle 4I is iixed at its inner end by means of an adhesive or the like to the top of the sheet or cover plate 31, the front end thereof extending through an arcuate slot 42 in the front plate 32.

Key letters A to G are inscribed or printed on the front side of the front plate 32 and three marks as lines 44 precede the letters and are spaced apart a distance equal to the spacing of the letters A to G and the columns of numbers on the date sheet or plate 35.

The arcuate outer edge of the sheet 35 is notched as at 45 intermediate the length thereof to provide outwardly extending stops 45 at each side of the sheet 35, which are engageable with the stop bar 41 for limiting the travel of the plate 35 in either direction. The stop bar 41 r overlies the edge of the notched side 45 and acts somewhat as a brake to hold the date sheet 35 against sliding until the bumper 48 xed in the corner formed by the strap 38 and cover plate 31, engages in the notch 49 in the side of the sheet 35, whereupon the indicator 4I and sheets 35 and 31 will be moved in unison.

The procedure for the use of the calendar 30 is the same as that for the calendar I. While no Roman numerals are shown on the calendar 3U, the pointer 4I is moved back a certain number of spaces to cover the last days of the month not required.

The arcuate edge of the plate 31 is notched twice as at 50 and 5I, the second notch 5I being necessary only to provide a plate 31 of a width greater than that of plate 35 so the plate 35 may be disposed between the edges of the plate 31 for the reasons set forth above.

When no Roman numerals are affixed on the calendar, the correct spacing for moving the pointer back to cover the last days of the month may be gured from the following:

February, 28 day month, return pointer 3 spaces from key letter;

February, 29 day, return pointer 2 spaces;

April, June, September and November, 30 days,

return pointer 1 space;

January, March, May, July, August, October and December, 31 days, do not return indicator.

and those before 1752 are in the Julian calendar. Not al1 of the countries made the change in 1752...

DNOSAJJMAMFJ EOCEUUUAPAEA c V T 1 G L N Y R R B N 1900-1099 180o-1899 1700-1799 T Y E I L DBFDAECGEGAE188603204 92643608 96684820* ECGEBFDAFOC 89613305 93653709 97694921 FDAFCGEBGDDA 906234060094663810 98705022 GEBGDAFCAEEB916335070195673911 99715123 BGDBFCAECGFC192643608 96684012 726224 CAECGDBFDAAE 93653709 97694113 73 25 DBFDAECGEBBF 94663810 98704214 74 26 ECGEBFDAFCCG 95673911 99714315 75 27 GEBGDAFCAEDA'496684012 724416 76 2800* AFCAEBGDBFFC 9769411302 734517 77 2901 BGDBFCAEOGGD 9870421403 744618 78 3002 CAECGDBFDAAE 99714315 754719 79 3103 ECGEBFDAFGBF5724416 764820 80 3204* FDAFCGEBGDDA 734517 774921 81533305 GEBGDAFCAEEB 744618 785022 82543406 AFCAEBGDBFFO 754719 79512300 83553507 CAECGDBFDAGD'5764820 805224 84563608* DBFDAEOGEBBF 774921 815325 85573709 ECGEBFDAFCGG 785022 825426 86583810 FDAFCGEBGDDA 795123 835527 87593911 AFGAEBGDBFEB5805224 845628 88604012* BGDBFCAECGGD 815325 85572901 89614113 CAECGDBFDAAE 825426 86583002 90024214 DBFDAEOGEBBF 835527 87593103 91634315 FDAFCGEBGDOG-1845628 88603204 92644416* GEBGDAFOAEEB 855729 89613305 93654517 AFCAEBGDBFFC 865830 90623406 94664618 BGDBFCAEOGGD 875931 91633507 95674719 I do not mean to conne myself to the exact therein, the indicia on said face plate being cordetails of constr-uction herein disclosed, but claim related with a chart for determining the proper all variations falling within the purview of the positioning of said series in the enlarged opening appended claim. in said face plate, whereby pivoting said date WhatIclaim is: 50 and cover plates for registering said indicator A perpetual calendar of the kind described with a selected one of the indicia on sa1d face comprising a front face plate, a rear date plate, plate Will properly position said series 1n sa1d ena segmental arcuate cover plate between the rear larged opening and said cover plate may be plvplate and front plate, an indicating arm xed oted in a reverse direction for covering selected relative to said cover plate, a pivot pin pivotally 5,) ones of the series immediately adJacent sa1d connecting said plates together for pivoted movepivot. ment one relative to the other, segmental arcuate ALFE PATTERSON. series of numerical date indicia on said date plate concentric to said pivot pin, the numbers REFERENCES CITED of said series increasing as the series approach 6o n f d t1 said pivot, said face plate formed with an en- The fcilowmig relfezen-,es ale o iecor 111 1e larged segmental arcuate opening for exposing 111e of thls paf entcertain columns of said series exposing the dates UNITED STATES PATENTS of a selected month, said cover plate having a notched peripheral edge for overlying certain Number Name Date selected ones of said indicia of said exposed series D 786,618 Ball et al Apr. 4, 1905 immediately adjacent said pivot, said cover plate 818,577 Summerall Apr. 24, 1906 formed with a segmental arcuate slot therein, a 1,253,562 Appelbaum Jan. 15, 1918 pin xed on said date plate engaging in said slot 1,579,358 Guilline Apr. 6, 1926 providing a lost motion connection between said 70 1,661,110 Cox Feb. 28, 1928 date and cover plates whereby said date lplate FOREIGN PATENTS may be pivoted relative to said face plate after T nt initial pivoting of said cover plate, indicia on sa1d wmbel COUP-'Cry Da e cover plate perceptible through a segmental 30,417 Gemanyf June 29, 1384 arcuate opening in said front plate, indicia on 137,913 Great 131133111 Jan- 29 1920 said front plate adjacent the latter opening 75 395504 Great Brltam '1111527 1933 

